/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.dubbo.config.spring.context;

import org.apache.dubbo.common.extension.ExtensionLoader;
import org.apache.dubbo.config.spring.util.DubboBeanUtils;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;

import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;

/**
 * Dubbo spring initialization entry point
 */
public class DubboSpringInitializer {

    private static Map<BeanDefinitionRegistry, DubboSpringInitializationContext> contextMap = new ConcurrentHashMap<>();

    public static void initialize(BeanDefinitionRegistry registry) {

        if (contextMap.putIfAbsent(registry, new DubboSpringInitializationContext()) != null) {
            return;
        }

        // register common beans
        DubboBeanUtils.registerCommonBeans(registry);

        // prepare context and do customize
        DubboSpringInitializationContext context = contextMap.get(registry);
        context.setRegistry(registry);
        customize(context);
    }

    private DubboSpringInitializer() {
    }

    private static void customize(DubboSpringInitializationContext context) {

        // find initialization customizers
        Set<DubboSpringInitializationCustomizer> customizers = ExtensionLoader
            .getExtensionLoader(DubboSpringInitializationCustomizer.class)
            .getSupportedExtensionInstances();

        for (DubboSpringInitializationCustomizer customizer : customizers) {
            customizer.customize(context);
        }
    }
}
